tests: fix propagation of LD_LIBRARY_PATH in wrapper.
tests: fix propagation of LD_LIBRARY_PATH in wrapper.

	* src/tests/bin/urbi-launch.in (debug): Rename as...
	(verbose): this, for consistency.
	(DYLD_LIBRARY_PATH, LD_LIBRARY_PATH): Fix their propagation, we
	used to ignore the possibly existing previous value.

urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi